That is Luna up there, not Night Mare Moon. So this is definitely after she escaped and was made good again. She has been shown to interact with the moon and if she does not visit it she at least puts her entire face on it to talk to Scootaloo.

I hate people that ship Rarity and Spike together. On top of them being two different species, Rarity is a woman whilst Spike is a little kid. Accepting such a ship is accepting that Rarity is a paedophile...